In the process of this realization, elaborate explanations have been made of the source pattern of the dendritic catalog data, the use of handle as well as the key priperties of TreeViewItem which can store the structure of data.

Spatial databases located on different peers collaborated with each other form a super global spatial database,and global spatial data directory is the key technology to locate spatial resources and spatial computing peer in Peerto-Peer networks.

To make full use of the data resource, a hierarchy architecture of massive data management system based on Grid is proposed, which consists of Metadata Catalog and Access Broker.

Multi-directory databases are an important part of the shared platform of heterogeneous databases.

This paper first analyses important significance of unified identity authentication, and then proposes that the design and implementation of directory database is very important in system .